Pump



w. T. SMITH June 26, 1928.

PUMP

Filed April 2, 1927 Patented June 26, 1938.

UNITED STA PATENT oFFicE.

some,

A pncaneii filed April 2,

This invention relates to pumps, more particularly to pump inil'ie'llersor runners used in connection more particularly with hydraulic dredgingoperations.

Heretoforc it has been quite usual to pump up the Water and solid matterinto the bins of seu going barges or dredges and allow the solid matterto settle out. This proced uie iiiy'olves considerable delay in settlingout process. The broad object of this invention is to proVide a pumphaving such construction that in the pumping operation the liquid willbefmostly separated from the solid matter, the liquid being dischargedfrom one outlet and the solid orsemi-solid matter being dischargedthrough another outlet and thence into a suitable bin or storagesection. V 7

Further objects are to provide a novel runner or impeller for drawing inthe mate'- r'ial to be actedvupon, separating it, and forcing it out inits separated state; to provide a cheap readily renewable screenelement; to provide simple means on the runnerrmconfining the screenradially and causing it to turn with and, as part of, the runner orimpeller; to provide a runner or inipeller .oomprisi'ng impeller bladesand a circuniferentially arranged straining means disposed at aninterval from the path of travel of the radially outer ends of saidblades to consti'tut-e an inner annular chain her, in combination with acasing in which said runner is mounted, said casing having a dischargeoutlet communicating with said inner chamber and having" its innerp'eripheral face arranged at an interval from said straining means toprovide an outer annular chamber between said inner face and saidstraining element, said outer chain} her being adapted to receive liquidforced through said straining element and said casing being formed witha separate dis-'1 charge outlet communicating with said outer chamber,Wlie'reby' the materials in said annular chambers will be dischargedthrough separate outlets in their separated state; to provide a runnercomprising blades, 21 straining eleli'nent and means for confining saidstraining element radially so as to hold it to form and c'ause' it torotatejas a part of said runner, in combination ivith a casing in whichsaid runnerarranged, said casiiig having a removable partnorinallypreventingiinial movement of said strainer element While permitting easyaccess there'- 192'7'. Serial 1%.. 130,553.

to and removal thereof in anaxiai direction;

to provide a construction of runner blades curvilinear in shape Withtheir 'conveX faces nted in the direction of rotation to foite thematerials outward radially and create a strong: pressure to force themater'ials, as separated, under pressure out of their separate outletsWithout other means ofpropulsion; to provide readily rem'ov able andrenewable liner element provided with a relatively fixed spade elementprojec'tii g, as assembled, into the inner annular chaniber', preferablythe upper: portion thereof, and registering with the discharge thereofto aid in discharging the material therefrom and to act as ascrape'r inkeeping the strainer element unobstructed or clean; and to otheriviseimprove and simplifyth'e construction and operation, all of which object's, "among others, are accomplished by the construction, combinationand arrange ment of parts, all as hereinafter set forth and described. Ip

In the accompanying drawings in which onlygseyeral of the possibleembodiments of my invention are shown and described for the purpose ofillustrating my invention and a the practice thereof as by law required,but with no intention of being limited thereto,

it being recognized by me that it is capable of embodiment in a numberof other forms:

Fig. 1 represents a sectional view of a de-' v'ice e bouyng my inventiontaken on line 1'1 of Fig. 2; I, l I

I Fig. 2 represents a sectionalyiew thereof taken at right anglesto'Fig. l;' on line 22 of said said figure;

Fig. 3 represents a fragmentary sectional View of a modified strainerconstruction having two nesting cylinders With an intervening layer ofgu'nny sacking or other suitable straining material and l i'gf'iire 4representsa detail fragmentary View on line of Fig. 2, looking in thedirection of the anew, omitting, however, all parts ei'cept the liner 2and the spade shown integral therewith,

Referring'now in detail to the drawin s,

the casing comprises an annularineinberA, side plates and'B secured tothe n'ieiiiber by" of in any Qtliefusual Side platefB is centrally b'oed and provided with a bushing E ehieh ieives eering r packed, by theusualglafidnut G. I The side plate B is provided was a central in'lejt'H.

and with a discharge port 1 inoltli peeps eral member A is provided witha liquid discharge port D, and base I. The runner or impeller shaft 5extends through the central bore of plate B and has its inner end 6reduced and preferably externally screw threaded to receive thepreferably internally screw threaded hub 7 of the runner comprisingpreferably, an imperforate disk 8 having the preferably equi-distantlyspaced strainer holdingfingers 11 extending from its edge axially towardthe intake side of the casing, and curvilinearly disposed vanes 9 havingtheir convex faces presented in the direction of rotation indicated bythe arrow, Fig. 2, said vanes preferablyhaving end faces 10 arcuate inshape struck on the circle described by said ends, and said vanesextending equally to a point radially at a distance from the strainer toleave an annular space between the strainer 12 and the path of travel ofthe ends 10 of said vanes 9 which, however, turn together with saidstrainer 12, practically as a single part.

The runner assemblage as arranged in the casing is spaced from the plateB by removable liner 4: and from the plate B by removable liner 2 andthe strainer 12 is disposed at an interval from the inner face of theelement A, said interval being substan tially the same as the intervalbetween the ends 10 of the runner vanes 9 and the strainer 12, thus ineffect constituting an inner and an outer annular chamber concentriowith each other and with the axis of the runner or impeller, the outerchamber discharging its liquid contents through the discharge D and theinner chamber discharging through the opening 1.

The liner 2 is provided with a preferably integral projection or spade 3having a curved and radially outwardly inclined inner face and is soformed and positioned as to register with one side of, and extend into,the opening 1 and as thus positioned and arranged itsinncr portionextends into the inner annular chamber between the strainer 12 and therunner vanes 9 for a distance nearly the actual width of said chamberand so as to be in, or almost in, contact by its radially outer facewith said strainer 12 so as to intercept any solid or semi-solid.

material in said chamber as the same is carried around by said strainer12 and to 10 and will be of a size tojust fit tightly between saidequi-distantly spaced fingers 10, the fit being so tight as to preventrelascreen and creates a pressure that forces the 7 water in the outerchamberoutward through discharge D and also forces the solid andsemi-solid matter outward through discharge 1, this latter operationbeing facilitated by the spade 3. r

The liners 4: and 2 may be held in place by screws 13 extending throughtheir respective plates B and B as illustrated in Figure l, or by anyusual and suitable means now commonly employed forthat, or similarpurposes.

The discharge 1 communicating with the inner chamber may be, andpreferably will be, defined by a removable liner or wear bushing 14,held in place in any suitable manner, as by screws 15, and the intakeopening H may similarly be, and preferably will be, defined by aremovable liner or wear bushing or lip 16, which extends slightly beyondthe inner face of the liner 2 and which may be similarly held in placeby similar screws 15.

The supply and discharge pipes not shown may be connected with theirinlet and discharge ports in any suitable manner.

While it is preferred that the runner should have an imperforate partsuch as disc 8, this is not essential, but it is important that somemeans, rotating with the vanes 9, be provided for maintaining thestrainer 12 in proper position with relation to the ends of said vanes 9and the member A so as to provide the inner annular chamber for thesolid or semi-solid matter and the concentric outer annular chamber forthe liquids, substantially as above described.

In the modified form in Figure 3 the construction and operation are inall respects the same as in the preferred form above described, exceptthat instead of the strainer 12 a composite screen comprising an annularouter perforated band 12 and a similar band 12 nesting in-said outerband 12 and an intervening layer of gunny sacking or other suitablematerial 12, is substituted for the strainer 12, the perforations inbands 12 and 1.2 being considerably larger, or several times larger,than the perforations in the strainer 12.

In both forms illustrated the runner will preferably have a'disc 8 onits intake end, said disc 8 being, of course, formed with a centralintake opening concentric with the intake opening in the end plate B andof such size as to receive, and be centered by the inner end of theintake lining or removin saidcasing, andi'neans for: rotating'saidimpeller, said impeller comprising impeller vanes, and anannularstrainer element immovable with relation to said blades and spacedbetween the radially outer ends thereof and the opposed face ofsaidcasing, whereby two concentric annular chambers are provided, the innerchamber discharging through one ofsaid discharge ports and'the outerchamber discharging" through theotherof said discharge ports,

2. A: pump casing having an intake port and two independent dischargeports, in combination-with a rotary impeller arranged in said casing,and means for rotating saidimpeller, said impeller comprising impellervanes, and an annular strainer element immovable with relation to saidblades and arranged substantially equi-distantly, in a radial direction,between the radially outer ends thereof and the opposed face of saidcasing, whereby two concentric annular chambers are provided, the innerchamber discharging through one of said discharge ports and the outerchamber discharging through the other of said discharge ports.

3. A pump casing having an intake port and two independent dischargeports, in combination with a rotary impeller arranged in said casing,and means for rotating said impeller, said impeller comprising impellervanes, fingers carried by said'impeller and extending at points aboutthe axis thereof axially toward the intake side of said casing, and anannular strainer element fitting between said fingers and heldsubstantially immovable with relation to said blades and as thus mountedbeing arranged between the radially outer ends thereof and the opposedface of said casing, whereby two concentric annular chambers areprovided, the inner chamber discharging through one of said dischargeports and the outer chamber discharging through the other of saiddischarge ports.

at. A pump casing having an intake port and two independent dischargeports, in combination with a rotary impeller arranged in said casing,and means for rotating said impeller, said impeller comprisingcurvilinearly disposed impeller vanes, having their convex facespresented in the direction of rotation of said impeller, and an annularstrainer element immovable with relation to said blades and spacedbetween the radially: outer ends" thereof and the opposed face ofsaidlcasing, whereby two concentric annular chambers are provided theinner chamber discharging through one of said dIS QhtIIgG ports and theother chamber discharging,

through the other of said, discharge ports.

5, A pump casing having an intake port and two independent dischargeorts, in combination with a rotary impeller arrangedin saidcasing, andmeansfor rotat ing, said impeller, said impeller comprisingcurvilinearly disposed impeller vanes having their convex facespresented in, the direction of rotation of said impeller, and an annularstrainer element immovable with relation to said: blades andarlangedsubstan-v tiall-,- e ui distantl 1 in a radial direction .a

between the radially outer ends thereof and the opposed face of saidcasing, whereby two concentric annular chambers are provided,

theinner chamber discharging through one of said discharge ports andthe, outer-chem} ber discharging throngl'i the other )of' said dischargeports. 7'

6. A pump casing: hav ng an intake port and two independent dischargeports, con'ib nationwith a rotary impeller arranged.

in said-casing, and means for rotating said impeller, said impellercomprising impeller vanes, an annular strainer element immovable withrelation to said blades and spaced bet-ween the radially outer endsthereof and the opposed face of said casing, whereby two concentricannular chambers are provided, the inner chamber discharging through oneof said discharge ports and the outer chamber discharging through theother of said discharge ports, and a spade element held immovable withrelation to said casing, and

registering with one of said discharge ports and extending axially intosaid inner annu: lar chamber in proximity to said strainer element toscrape the more solid matter therefrom and to direct the solid andsemisolid matter in.said inner chamber outward through its co-operatingdischarge port. I

7. A pump casing having an intake port, a radially outer discharge portand a radially inner discharge port in combination with a rotaryimpeller arranged in said casing, and means for rotating said impeller,said impeller comprising impeller vanes, an annular strainer elementimmovable with rela tion to said blades and spaced between the radiallyouter ends thereof and the opposed face of said casing, whereby twoconcentric annular chambers are provided, the inner chamber dischargingsolid and semi-solid material through the radially inner discharge portand the outer chamber discharging fluids through the radially outerdischarge port, a normally fixed removable liner plate, and a spadecarried by said liner plate, immovable with relation thereto ionregistering with said radially inner discharge port and extending in anaxial directioninto said inner annular chamber in close proximity to theradially inner face of said strainer element. I

8. A rotary pump impeller comprising vanes, a portion turning with saidvanes, immovable with relation thereto and extending to at least aplurality of diametrically opposite points radially beyond the radiallyouter ends of said vanes, parts extending from said diametricallyopposite points,and an endless band perforated sheet metal strainer heldby said parts so as'to extend concentrically about the axis of saidimpeller and so as to turn with said vanes.

9. A rotary pump impeller comprising vanes, a disc turning with saidvanes and extending radially beyond the radially outer ends of saidvanes, fingers extending at equidistant points about the edge of saiddisc in an axial direction toward said vanes,'and an endless bandperforated sheet metal strainer applied in an axial direction betweensaid fingers and of such diameter as to be held tightly thereby to turntherewith.

10. A rotary pump impeller comprising vanes, a portion turning with saidvanes, immovable with relation thereto and extending to at least aplurality of diametrically 11. A removable liner plate for a pumpcasing, said plate being formed with a lateral discharge opening, and aspade element immovable with relation to said plate projecting lateralltherefrom away from, and registering wit 1, said discharge opening.

12. A removable liner plate for a pump casing, said-plate being formedwith a lateral discharge opening and an integral spade element immovablewith relation to said plate projecting laterally therefrom away from,and registering with,'said discharge opening.

13. A removableliner plate for a pump casing, said plate being formedwith an integral spade element adapted, in the arranged relation of saidliner plate, to project into the interior of said casing.

In testimony whereof, I have signed my name to this specification at NewOrleans,

Louisiana, this 22 day of March, 1927.

' WALTER T. SMITH.

